eventually rescuers went down on ropes, retrieving the dog, and they air-lifted the woman off the beach. we are told her injuries were not serious. >>> if you're still not a dog person after that, listen to this. christin ayers tells us university researchers say your cuddly cat is actually one of the most blood thirsty killers on the planet. >> reporter: it's the world from an outdoor cat's point of view. researchers attached so-called kitty cams to felines and recorded their surprisingly violent adventures. killing a frog, scaring off a possum. >> i always think of them as so cuddly. >> reporter: but lauren knows better. she's seen her cat in action, and her sister's cat is a born hunter. >> every morning, they brought me little gifts of dead birds, dead possums. >> reporter: despite their cuddly exteriors, cats kill more than car accidents, pesticides and poison. the audubon society has been fighting for years to educates people about their cat's killer instincts. it's an issue that is divided. >> a lot of the folks that come to the human society have been really focused on the welfa